Now that you've got your bikini and beach body trivia down cold, it's time to kick it up a notch. Summer is in full swing, which means it's prime time for our favorite stars to hit the beach and test out their skills at water sports. Take our quiz to see how much you know about who's riding the waves and who's wiping out.

Question 1

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Guess whose surfing skills are much better than his social skills? Zac Efron Spencer Pratt Chace Crawford Emile Hirsch

Read more at: http://feeds.feedburner.com/~r/popsugar/~3/338254843/1790573.